Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Bill Sloman Newsgroups: sci.electronics.design Subject: Re: Yttrium iron garnet Date: Thu, 30 May 2024 15:45:21 +1000 Organization: A noiseless patient Spider Lines: 31 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Thu, 30 May 2024 07:45:30 +0200 (CEST) Injection-Info: dont-email.me; posting-host="d51a066cbca6b09280003e705595f526"; logging-data="1656379"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19/rx1wk3JaVUeSB6/HJ53oSHp4X6r2h7I=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:QXV3mh/Dij7kXPFeLUUtrfgAhAI= Content-Language: en-US In-Reply-To: Bytes: 2300 On 30/05/2024 3:37 am, john larkin wrote: > On Wed, 29 May 2024 17:12:21 -0000 (UTC), Cursitor Doom > wrote: > >> On Wed, 29 May 2024 13:52:34 +1000, Bill Sloman wrote: >> >>> Yttrium iron garnet tuned oscillators were around back then, but their >>> 2GHz to 8GHz range was too high for me to count with the integrated >>> circuits around then - we had to go the Gigabit Logic's GaAs parts to >>> get to 800MHz, and that became the unique selling point of the system. >> >> YIG oscillators were quite the thing back in the day, but I'm guessing >> they've been completely superseded by now to get to ever higher >> frequencies. Seems we've gone from - This misses Jan Panteltje's thread "Small magnetic tunable filter for 6G and beyond" which is about Yig being used today. >> R/C to L/C to Xtal to YIG since about 1900. Did I miss any development(s) >> out pre-YIG? > > Tuning forks, SAWs, BAWs, mechanical ceramic resonators, dielectric > ceramic resonators, coaxial ceramic resonators, sapphire, cavities, > atomic things. As usual, John Larkin hasn't noticed that most of his list can't be rapidly tuned to a different frequency. -- Bill Sloman, Sydney